- TITLE:
-
Ping-Pong Sample Times on a Linear Array
Halve the Nyquist Rate
- AUTHORS:
- Jeffrey O. Coleman
- ABSTRACT:
-
Staggering the sample times for alternate elements of
a linear antenna array is shown to halve the usual
Nyquist sample-rate bound of twice the one-sided
signal bandwidth while preserving alias-free mapping
between spectral components and plane waves in the far
field. The approach can be used on transmit or
receive and with lowpass or bandpass sampling, and it
can involve analog up- or down-conversion between data
conversion and the array. The usual element-spacing
bound of half a wavelength at the upper RF band edge
is replaced with a quarter-wavelength bound at the
center of the Nyquist sampling band referred to RF, a
reduction only for bandpass sampling.
- DOWNLOADABLE PREPRINT (expected to be available in the spring of 2004):
-
PDF (181595 bytes),
- STATUS:
- Presented to the 2004 IEEE Int'l Conf. on Speech,
Acoustics, and Signal Processing (ICASSP 2004), Montreal,
Quebec, Canada, May 17--21, 2004.
- DATE OF ENTRY:
-
June 2004.